Superfund sites exist all throughout the country, according to the EPA Superfund website. The website defines a Superfund site as "an uncontrolled or abandoned place where hazardous waste is located, possibly affecting local ecosystems or people."

Superfund sites often encourage composting of toxic sludge, the byproduct of hazardous waste and sewage sludge waste and wastewater treatment plants in the United States. The EPA calls composted sewage sludge by its devised PR euphemism "biosolids", and often uses so-called "nutrient rich," "organic biosolids compost" to remedy contaminated soils at Superfund sites.[2]